Scissors and method of manufacturing the same



Jan. 2, 1934. J. BRANGS; JR

SCISSORS AND METHOD OF MANUFACTURING THE SAME led Dec. 7, 1951 C I915 d Patented Jan. 2, 1934 UNITED S ATES.

SCISSORS AND METHOD OF'MANUFAC- TUBING THE SAME Julius Brangs, J12, Solingen, Germany Application December 7, 1931, Serial No. 579,534, and in Germany August 13, 1930 3 Claims. (oi. 36-104) V This invention relates to an improved method for the manufacture of scissors and to the scissors themselves that have been manufactured according to this method. More especially, the invention relates to scissors composed of separate handle legs and of separate cutting legs affixed to said handle legs. The manufacture of scissors in which each handle leg is integral with the appertaining cutting leg necessitates a big number of working phases which have already been reduced by manufacturing the handle leg and the cutting leg separately, especially from hollowpressed steel, for the cutting leg, this latter being stamped out of unhardened sheet-steel, and the legs being then shaped, hardened, ground and polished. But also this manufacturing procedure is circumstantial and sulfers, besides, from the drawback that the thin legs are subject to warping during the hardening, so that much waste arises. It is, however, if the scissors are to cut in the proper manner, necessary that their cutting legs and edges are straight.

The present improved method consists therein that the cutting .legs are stamped out of hardened sheet-steel. The thin sheet-steel may be used in bright state, and preferably a steel band is used, the breadth of which corresponds approximately to the breadth of the cutting legs. The sheet-steel or the steel band may be hollow pressed either prior to-the stamping or simultaneously therewith or thereafter, the stiffness of the legs being in every case increased by the thus obtained transverse shape. A particular mode of carrying out the method is this that steel-bands are used which are so rolled out that one of the two longitudinal edges is thicker than the other, whereas this latter is thin and sharp, this edge constituting the edge of the cutting ledge after the stamping.

It has been found that, if suitable tools are used for carrying out this method, cutting legs for all sizes of scissors can be manufactured very successfully in a highly satisfactory manner, these cutting legs answering all purposes of scissors of first-class quality.

The cutting legs may be secured to the separately manufactured handle legs in any desired manner, for instance by means of screws or rivets, or by soldering and the like. The great advantage obtained by manufacturing the cutting legs in the manner stated resides therein that afterhardening is rendered unnecessary and warping of the cutting legs is, therefore, obviated, and also after-polishing can be obviated if bright material is used. The grinding or sharpening otherwise necessary can be restricted to-a superficial grinding or sharpening of the edges, because the cutting edges are already from the beginning very accurate if proper stamping tools have been employed. r

Big advantages are obtainedwith the aid of the present improved method especially in the case of wholesale production.

In'order to make my invention more clear, I refer to the accompanying drawing in which my 35 invention is illustrated diagrammatically and by way of example, and in which Figure 1 shows a piece of band steel, out of which the cutting legs are to be stamped. Figure 2 is a view of complete scissors manufactured according to this invention. Figure 3 is a view of the two legs forming one half of the scissors. Figure 4 is a transverse section in the plane A-B of Fig. 2. Figure 5 is a transverse section in the plane C-D of Fig. 3, and Figure 6 is a transverse section through a 76 cutting leg having a sharpened profile.-

Manufacturing the scissors is carried out as follows:

Concerning, first, the handle legs b these may be made in any known and desired manner; for 80 instance by casting in moulds or by pressing or forging in swages. As to the cutting legs a, however, I prefer to make use of hard bright sheet-steel, especially thin steel bands, as f in Fig. 1, the cutting legs being stamped out of this hand, as indicated by the dotted line a. The leg at (Fig. 3) is then pressed hollow in its longitudinal direction, i.- e. from the tip to the opposite end, as shown in- Fig. 5. I wish it, however, to be understood that the pressing procedure may be carried out also already prior to the stamping, there being then not the stamped leg, but the steel band subjected to the pressing operation, but the pressing may also be eflected simultaneously with the stamping, as preferred. The stamping-out of the cutting leg may be effected also in this way that one of the edges of the leg lies just at one of the edges of the band.

The handle legs I; are there where they are to be connectedwith the cutting legs hollow on the inner side, and a square or similarly shaped projection 0 extends forth from that place. If the handle legs are cast or if they are welded, said projections are hollow and the connecting member for the scissor halves, which may be a ,105 screw e (Fig. 4) is introduced into the oppositely located bores of the said projections, one of the bores being, of course, screw-threaded. Instead of a screw a rivet may be used as connecting member. Each cutting leg has a suitably shaped used already in hard state.

other edge.

cutting legs are sufficiently rigid anddo not change their shape, in that no subsequent annealing need take place, the steel having been The cutting edge which has been rendered sharp already in the stamp requires only a superficial after-treatment at the grindstonc.

Another mode of carrying out the process con- 7 sists therein that the steel band 3 is rolled-out between specially profiled rollers in such a manner that it is thicker at one edge than at the When then the cutting edges are stamped out of that band, the edge a is already nearly as sharp as required and only slight aftergrinding. is needed.

I-claim:

1. A method of manufacturing scissors composed of separable half portions, each including a handle leg and cutting member, which consists in forming both the handle legs with concave end portions and with integral hollow pivot lugs in said concave portions, separately forming both cutting members from a steelband having a sharp edge, and with holes in the ends of the cutting members to fit the-hollow lugs of the leg members uniting the blades to the" handle legs and thereafter passing a pivot through the lugs whereby the concave surfaces of two cutting members when so united will accommodate said pivot lugs.

2. The method of manufacturing scissors com- 1 posed of separable handle legs and cutting members, which consistsin forming the cutting members from hand steel having the proper thickness from its outer edge to its cutting edge and shaping the cutting members each to have an inside concave surface, and stamping a; hole therein; shaping the pivot end of each handle leg to lit the outer end' surface of the cutting member, forming integral hollow pivot lugs on each handle leg to fit the hole in the concave portion of each cutting member uniting the blades to the hanfaces and having holes therethrough, the hand 2 legs having integral ,hollow lugs extending" through said holes into the space between the concave surfaces of the cutting blades and a pivot extending through the lugs.

r JULIUS BRANGS,JR. 

